Coke-oven.



W. LT. KEARNS.

COKE OVEN.

APPLICATION IILBD MART/,1000.

Patented May 3, 1910.

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W. JQKEARM COKE OVEN.

APPLICATION FILED MAILZY, 1909.

Patented May 3, 1910.

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WILLIAM J. KEARNS, 0F FAIRCHANCE, PENNSYLVANIA.

COKE-OVEN.

Specification of Letters Patent.

Patented May 3, 1910.

Application led March 27, 1909. Serial No. 486,159.

To all whom it may concern:

Be it known that I, WILLIAM J KEARNS, citizen of the United States,residing at Fairchance, in the county of Fayette and State ofPennsylvania, have invented certain new and useful Improvements in Coke-Ovens, of which the following is a specification.

This invention relates to coke ovens and more particularly to means fordrawing off the products of combustion from said ovens and utilizing thewaste heat for generating steam or for other industrial purposes.

The object of the invention is to provide a coke oven having a flue orconductor communicating with the interior of the oven at the tunnel headthereof for directing the waste heat from the incandescent bed of fuelto a steam generator, or other suitable source of discharge, means beingprovided for closing the conductor so as to prevent the passage of coldair through the oven to the boiler when drawing the oven.

A further object of the invention is to provide means for maintaining acirculation of air beneath the flue or conductor thereby to prevent theintense heat of the oven from melting or otherwise injuring saidconductor.

A still further object of the invention is generally to improve thisclass of devices so as to increase their utility, durability andetHciency.

Further objects and advantages will appear in the following description,it being understood that various changes in form, proportions, and minordetails of construction may be resorted to within the scope of theappended claims.

For a full understanding of the invention, reference is to be had to thefollowing description and accompanying drawings, in which:

Figure 1 is a longitudinal sectional View of a coke oven constructed inaccordance with my invention, taken on the line 1-1 of Fig. 2. Fig. 2 isa top plan view of the oven. Fig. 3 is a transverse sectional view takenon the line 3 3 of Fig. 2. Fig. 4 is a similar view taken on the line 44: of

orresponding and like parts are referred to in the following descriptionand indicated in all views of the accompanying drawings by the samereference characters.

The mechanism employed for drawing off the products of combustion, isshown, by way of illustration in connection with a bcehivc type of cokeoven in which 5 designates the crown, 6 the tunnel head and 7 the ovendoor, through which the coke is withdrawn from the interior of the oven,in the usual manner.

Disposed above the crown 5 of the oven and preferably formed of firebrick or other refractory material is a flue or conductor 8, one end ofwhich is extended downwardly at 9 and communicates with a main flue 10leading to a steam generator so that the products of combustion from theinterior of the oven may pass through the conductor 8 and main flue 10to the boiler, and utilized for the purpose of generating steam.

The opposite vertical walls of the conductor 8 at the horizontal portionthereof are provided with ledges 11 which form a support for a pluralityof removable slabs or tiles 12, the latter being also preferably formedof refractory material in order to successfully resist the intense heatof the oven. One of the slabs 12 is positioned over the central opening13 in the tunnel head (i and forms a closure for the crown of the oventhereby to prevent the admission of air into the interior of the ovenduring the formation of the coke.

Vertically disposed grooves 14 are preferably formed in the oppositeside walls of the conductor 8 for the reception of one of the removableplates or slabs 12, which plate or slab when positioned in the grooves14 constitutes a valve and serves to control the passage of the productsof combustion from the coke oven to the steam generator. Thus it will beseen that when one of the slabs or plates 12 is positioned in thegrooves 14, the door 7 may be opened to permit the withdrawal of thecoke from the interior of the oven without creating a draft in the flues9 and 10, which` passage of air would have a cooling effect on thegenerator and thus reduce the pressure of steam in the boiler.

Disposed beneath the bottom of the iiue 8 at the horizontal portionthereof are spaced longitudinally disposed air passages 15 whichencircle the tunnel head 6 at the opening 13 therein and are connectedby a plurality of transverse passages 16, there being verticallydisposed flues or passages 17 formed in the opposite side walls of theconductor S and in communication with. the lon` gitudinal passages 15 soas to permit the free circulation of air through the several passagesand beneath the bottom of the conductor 8 thereby to cool said conductorand thus prevent the intense heat from the incandescent body of fuelwithin the oven from melting or otherwise injuring said conductor.

Attention is herewith called to the fact that the inner end of theconductor 8 extends through the Walls of the tunnel head 6, thusobviating the necessity of cutting one or more openings in the crown ofthe oven for the purpose of drawing off the products of combustion. Itwill also be noted that the conductor 8 is disposed at the ground lineand in convenient position to effect any necessary repairs thereto, theinterior of the flue 8 being exposed by removing one or more of theslabs or tiles 12.

WVhen it is desired to charge the oven, one of the slabs 12 is removedfrom the ledge 11 and positioned in the grooves 14 thus cutting ofi' thepassage of the products of combustion through the conductor to the steamgenerator. rlhe slab 12 above the central opening 13 is then removed andpositioned on the ledge 11 adjacent the grooves 14, and the coal orother fuel introduced through the opening 13 into the interior of theoven in the usual manner.

After the oven has been charged, the valve or slab 12 is removedfrom thegrooves 14 and again placed in position on the ledge 11 so as to permitthe waste heat due to the combustion of the fuel in the oven to passthrough t-he conductor 8 and main flue 10 to the steam generator, in themanner before described.

Vhen withdrawing a charge of coke from the interior of the oven one ofthe plates or slabs 12 is removed from the top of the Hue 8 andpositioned in the grooves 14 after which the door 7 is opened and thecoke in the oven withdrawn through the opening in the usual manner, theslab or valve 12 serving to prevent the passage of cold air through theinterior of the oven to the steam generator during the drawingoperation.

If desired, suitable baille plates may be disposed in one or more of thetransverse passages 16 for the purpose of retarding the passage of airthrough the same to the outlets 17 While the conductor is shown inconnection with a beehive type of coke oven, it will of course beunderstood that the same may be applied to other styles of coke ovens orto a battery of said ovens without departing from the spirit of myinvention. It will also be understood that if necessary to admit coldair into the flue leading from the oven to the main flue, in order topromote combustion of gases, it may be done by connecting air passageswith said flue at any desired point or points.

Having thus described my invention, what is claimed, is:

1. A coke oven including a combustion chamber and having a tunnel headprovided with a feed opening, the walls of the tunnel head being formedwith an air passage partially surrounding the feed opening therein, aconductor communicating with the combustion chamber at said feed openingand having its bottom wall provided with intersecting longitudinal andtransverse air passages communicating with the air passage surroundingthe feed opening and also with the atmosphere but sepa-rated from andindependent of the interior of said combustion chamber and conductorrespectively, to permit the circulation of cold air within said passageswithout coming in contact with the products of combustion in either thechamber or conductor.

2. A coke oven including a combustion chamber and having a tunnel headprovided with a feed opening, a conductor communicating with theinterior of the coke oven at said feed opening and having its wallsprovided with vertical air passages in communication with theatmosphere, there being a plurality of intersecting longitudinal andhorizontal air passages formed in the bottom of said conductor andpartially encircling the tunnel head, all of said passages beingseparated from and independent of the combustion chamber and conductorrespectively, thereby to permit the circulation of cold air within saidpassages without coming in contact with the products of combustion ineither the chamber or conductor.

3. A coke oven including a combustion chamber and having a tunnel headprovided with a circumferential air passage and a central feed opening,a main flue spaced from the oven and disposed in a plane below the feedopening, a downwardly inclined conductor forming a source ofcommunication between the main flue and tunnel head at the feed openingtherein, there being a plurality of intersecting longitudinal andtransverse air passages formed in the bottom wall of the conductor andcommunicating with the air passage in the tunnel head, vertical openingsformed in the opposite side walls of said conductor and communicatingwith the longitudinal and transverse passages and also with theatmosphere, and a plurality of removable slabs forming the top wall ofthe conductor, one of said slabs forming a closure for the feed openingand an- With the products of combustion n either other constituting avalve for controlling the the chamber or said conductor. 10 products ofcombustion to the main flue, said In testimony whereof I affix mysignature passages in the conductor and tunnel head in presence of twoWitnesses.

5 being separated from and inde endent of the WILLIAM J. KEARNS. [11.s.]

combustlon chamber and con uctor respec- Vitnesses: tively, to permitthe circulation of cold air S. P. FLENNIKEN, Within said passageswithout commingling M. J. KEARNS.

